Range from the cheapest powerflush £260 (Eric Amankwah based in N13) to the dearest powerflush £1000 (Flame-Test based in N13).
Comparing heating engineers estimates for powerflushing a central heating system gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes to powerflush in N21 by posting a job with HaMuch and we will send it to heating engineers in N21.